Malicious PDF — malware analysis report

Static analysis result for SHA-256 57eac17ad3897201…

MALICIOUS

PDF

73.4 KB Created: 2021-02-27 13:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 640652bdcacb066c6acfce08f294ecf6 SHA-1: 1cb11edb07a0b6b1c5ed8147f95991c93b2503a4 SHA-256: 57eac17ad3897201fb9bdcd3289dd9e63f51bc91c46b4df1fd898b8d0c2bddb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the document is designed to redirect users to external sites, likely for malware distribution or phishing, aligning with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/wix?keyword=ninja+cat+2+games+online PDF link annotation
    • https://cdn.sqhk.co/pulazapusaw/gJwhdVk/commander_collection_green_release_date.pdfIn PDF document text
    • http://vykupavto54.ru/81548801119fc11s.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/fomemanodi.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/84388067398.pdfIn PDF document text
    • http://13millions.store/78040134372uyza3.pdfIn PDF document text
    • http://magnifioco.site/guide_fall_guys_tips_realitybd4qj.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/haH0jaA/cross_stitching_fabric_count.pdfIn PDF document text
    • http://podeves.xyz/sky_force_game_2004urxr9.pdfIn PDF document text
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/momotizugaxegila.pdfIn PDF document text
    • https://sabexinutix.weebly.com/uploads/1/3/0/7/130740027/jasipodaw_xexakabalu_fipaminufuzofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/lilosomamukelewinaxexegub.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/pebimumosapusetesavaborad.pdfIn PDF document text
    • http://zebofazedixa.rf.gd/vector_dot_product.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/what_helps_you_get_rid_of_pimples.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/how_to_play_online_with_friends_on_nintendo_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/poggio_bracciolini_facezie.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 5200 bytes
SHA-256: 396857e2634802b12f283ec84db0b3e845658955dd773acd03908b635f06a60f
font_01_sfnt_off0000f75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75B 9832 bytes
SHA-256: a7c123647c757ea13397368eabd0c0bec50b3358981e776eb27e70e843bd121c

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